My Ruger #1 in 6mm is partial to 41.0 grs of IMR4064 with the 85 gr HPBT. Velocity is 3279fps ,book value, but my barrel is two inches longer(26" vs 24") used in the Lyman book. With the 100 gr Nosler Partition I use 42.5 gr of IMR4350 for around 3143 fps, again that's book value with the shorter barrel.Cases are Remingtion and primers are Rem 9 1/2. Killed a lot of deer with that load, but all at 100 yds or less.